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Pruning and Training Apple Trees for Maximum Yield & Fruit Quality
Tall Spindle and Vertical Axe
Stephen A. Hoying and Terence L. Robinson Department of Horticultural Sciences
Cornell University HVL and NYSAES
CIIFAD China March 2014
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Rule 1
• Plant only high quality Trees
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What is a Quality Tree
• Caliper and height • (Branching) Feathers • Standard Rootstock Shank
Length • Healthy Rootsystem • Budding or Grafting Method
Used • Pest Freeness
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Whips vs. Feathered Trees • Whips
– Readily available, easy to grow – Easy to handle and plant – Additional training and pruning – Delayed bearing by at least 1 year – Must be headed in nearly every situation
• Feathered Trees
– Yields at least one year earlier – Less training required – Much more profitable – Harder to get, harder to grow – Can be planted at a higher density than
whip of the same variety and same rootstock
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These are excellent tree for a High Density Planting System but must be severely pruned for lower density planting systems!
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Tree Planting
Planting Depth
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Water and Starter Fertilizer Solutions immediately after planting!
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Early Cropping
• "The best way of restricting vegetative growth is to produce apples."
• Cropping must begin: – In the second year with the Tall Spindle
– Limit cropping to 5 fruit/sq cm TCA by
HAND THINNING before fruit bud differentiation!
– Use return bloom sprays - NAA 3-4 X
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TCA= pi X r2
30 centimeter
Tree Trunk
Fuji = 5 fruit/sq cm TCA Gala = 8 fruit/sq cm TCA
Acceptable Crop Loads For 2nd-5th leaf trees
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Training of 2 Similar High Density Apple Planting Systems
Vertical Axis
• 100 trees/mu • 1.8m X 4.2m • Permanent bottom limbs • Upper limbs renewable
Tall Spindle • 200 trees/mu • 0.9m X 3.3m • No permanent limbs • All limbs renewable
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Vertical Axis
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Advantages - VAXE
• Early bearing 3rd - 4th leaf • Fast to mature bearing 5th – 6th leaf • High mature yields of excellent quality fruit
(3.5 tons/mu) • Simple and stable one wire and stake trellis • Plenty of room for moderate sized orchard
equipment • Lower establishment cost (tree numbers)
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Tall Spindle
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Pruning at Planting Vertical Axis
Tree spacing 1.5m or more
– Remove large side branches that compete with vertical tree growth using a bevel cut.
• Remove upright, narrow angled branches. • Remove scaffolds that are larger than 2/3 diameter of
leader. – Head or Tip leader – Head or Tip feathers
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Upright Scaffolds
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Essential Components TS and VA
Pruning and Training
• Branch devigoration • 1st leaf • Upright scaffold branches
are weakened by bending below the horizontal through bending.
• Use branch weights, rubber bands, or tying
• Branch bending maintains whole tree vigor, but keeps trees within allotted space, and encourages the production of fruit buds for the following growing season.
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Vertical Axis At Planting
• Remove excessively large feathers.
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Completely removed only two branches!
Vertical Axis At Planting
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Tree Training During the First Growing Season
Vertical Axis
– Select leader and remove competitive shoots immediately below at 5-10cm growth.
– Pinch tips of side shoots in upper 1/3 of leader when shoots are 10-15cm length.
– Re-pinch side shoots in upper 1/4 of leader if shoots regrowth an additional 10-15cm length.
– Tie leader to support system. – Tie down 4-5 lower branches to 35-40o angles before growth
stops to induce flowering and reduce vigor.
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Vertical Axis At Planting
After 10 cm shoot growth, remove new shoots which compete with the leader.
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Remove all buds below 60cm by
rubbing them out.
This will redistribute additional growth
into scaffold shoots and then leader!
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Dormant Pruning Year 2 Vertical Axis
• Do not head leader. • Do not head feathers • Remove side branches that compete with leader using a
bevel cut. • Remove narrow angled branches. • Remove scaffolds that are larger than 1/2 diameter of
leader.
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Tree at the end of the 1st year with all branches tied down shortly after planting
Tree at end of second year Feathers tied down in 1st
year
Tree at end of second year Feathers left
upright in 1st year.
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Re-Starting Weak Trees (Year 2 only)
• Vertical Axis
• Leader. – Prune severely down to 4 buds on
1 year wood. • Feathers.
– Remove all feathers and spurs using a bevel cut.
– Leave a stub 1/2" long.
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Tree Training During the 2nd Summer
Vertical Axis
• Pinch side shoots in upper 1/4 of leader when shoots are 4-5" long.
• Re-pinch side shoots in upper 1/4 of leader when regrowth is 4-5" long.
• Fasten leader to support system.
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Vertical Axis - Review Young Tree Management
• No Heading after the year of planting
• Use Pinching to slow vigorous growth near the leader
• Tie down vigorous scaffolds and remove large ones missed in previous years.
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Dormant Pruning Years 3-4
Vertical Axis
• Do not head leader • Remove 1-3 side branches above the bottom tier of
limbs that compete with leader using a bevel cut. These would include: • narrow angled branches. • scaffolds that are larger than 1/2 diameter of leader • those that complete directly with the leader
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Tree Training During the 3rd and 4th Summers
Pinch and re-pinch side shoots in upper 1/4 of leader when shoots are 4-5" long if you can still reach them from the ground.
Lightly summer prune to remove upright shoots that intercept sunlight and decrease fruit quality
Vertical Axis
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Dormant Pruning Year 5 Vertical Axis
• Reduce the number of lower scaffold branches to 3-5 if necessary because of crowding. Remove those that grow directly into the tree row or tree alley.
• Remove and renew 2-3 large limbs along the main
trunk for renewal. • Do not head leader; rather replace the leader that
has been bent below horizontal by crop load by cutting to a suitable upright shoot with fruit buds. This leader will likely bend and weaken by this years crop.
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1. Limit tree height to 90% of between row spacing by cutting leader back to a fruitful side branch. This tree height optimizes light interception with regard to adjacent rows so that lower branches receive enough light to remain productive.
2. Remove 1-3 of the largest limbs each year in the upper portion of the tree using a bevel cut concentrating on branches more than 1 inch in diameter. Preserve all weak fruiting wood; however, long pendant fruiting branches can be shortened to prevent shading of lower fruiting branches.
Vertical Axis Mature Management
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3. Keep 3-4 permanent lower tier scaffolds that are arranged in an X pattern with respect to the row, are horizontal and are not overly vigorous. Gradually remove all other lower scaffold branches. Shorten permanent bottom tier scaffold branches to facilitate tractor movement by pruning back to a side branch.
Vertical Axis Mature Management
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Super Spindle Tall Spindle 0.6m X 3.0m 1.0m X 3.3m 3.0m tall 3.3m tall
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Advantages – Tall Spindle
• Early bearing - 2nd leaf fruit • Fast to mature bearing – 4-5th leaf possible. • Very high mature yields of excellent quality
fruit 5.2 tons/mu. • Most profitable system tested to date. • Simple and stable trellis - 5-Wire Trellis with
3.65 m inline posts or 3-Wire with splints • Easily mechanized
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Tall Spindle Nursery Stock
• Highly feathered nursery trees – Nursery trees ideally have from
10-15 feathers, or short shoots per tree.
– Trees with scaffolds provide
bearing surface for production in the second leaf.
– Transplant shock caused by a
high top to root ration helps keep trees within this tight spacing. It also contributes to significant fruit bud differentiation the year of planting.
– Early bearing is essential to help
pay for increased tree numbers and establishment costs.
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These trees will need almost no
pruning
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Tall Spindle Density
• Higher density • 200 trees per mu or 3000
trees per hectare. • The optimum average spacing
for Tall Spindle is 0.9 X 3.4 m. • Maximum of 3.7 m between
rows. • The maximum in-row spacing
is 1.2 m. • Proper selection of density for
any system depends on consideration of the vigor of the variety and rootstock and the soil strength
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Essential Components – TS Rootstock
• Full dwarfing rootstocks – • The most successful Tall Spindle orchards established to date
have been on M.9 and B.9. Precocious dwarfing stocks are important since early cropping is essential.
• The yield efficiency and precocity of the Geneva rootstock series justifies their use especially where Erwinia amylovera is a concern. Geneva 41, G.11, G.214, and G.935 are all appropriate rootstocks for the Tall Spindle.
• More vigorous rootstocks than these should only be used with the weakest growing varieties such as Spur Delicious.
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Gala, G.11, 2nd leaf 2007
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General Rules for Training Tall Spindle
• Do not head leader or scaffold limbs, ever! • Remove feathers that compete with leader using a
bevel cut. • Tie down 5-8 feathers below horizontal at planting or
in July. • Remove narrow angled branches. • Remove scaffolds that are larger than 1/2 diameter
of leader. • Remove side branches that are longer than 2'. • Remember "large branches create large trees"
• Remove branches larger than 3.5 cm diameter.
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Dormant Pruning Year of Planting
Tall Spindle Tree spacing 1.2 m or less
– Do not head leader – Do not head feathers – Remove side branches that compete with leader using a
bevel cut. – Remove narrow angled branches. – Remove scaffolds that are larger than – 1/2 diameter of leader.
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Select a single leader shoot by removing all buds within 10cm
that compete with the leader before shoots are 12cm in length
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Remove all buds below 60cm by
rubbing them out.
This will put additional growth
into scaffold shoots and the leader!
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Tree Training During the First Growing Season
Tall Spindle
– Pinch side shoots in upper 1/4 of leader when shoots are 10-15cm long.
– Re-pinch side shoots in upper 1/4 of leader when regrowth is 10-15cm long.
– Tie leader to support system. – Tie or weight down 4-5 lower branches below horizontal in
July before terminal growth stops to set branches and induce flowering.
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• Do not head leader. • If they exist, remove 1-3 large branches
that are more than ½ the diameter of the trunk
• Remember “Big Branches makes Large Trees"
Dormant Pruning Year 2 and 3 Tall Spindle
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Tall Spindle Pinch side shoots in upper 1/4 of leader when shoots
are 10-15cm long. Re-pinch side shoots in upper 1/4 of leader when
regrowth is 10-15cm long. Continue to tie leader to support system. Reposition weights on upright vigorous scaffolds if
missed in year 1.
Tree Training During the 2nd and 3rd Growing Season
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Mature Tall Spindle/M.9 3’ x 11’ 11’ tall
The Tall Spindle has fruiting branches that remain for 3-6 years but no permanent scaffold branches
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Dormant Pruning Year 4 and 5
Tall Spindle
• Limit height of tree by cutting leader to a weak fruitful side branch.
• Remove branches larger than 3.5 cm diameter.
• Simplify remaining shoots by removing all large side shoots.
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Essential Components TS Pruning and Training • Minimal pruning at planting
• The Tall Spindle system is planted in place! Very little growth needed to fill the available space, therefore very little pruning is needed.
• Pruning is limited to only the
removal of a few larger branches along the leader. Generally, those that are more than ½ the diameter of the leader at the insertion point are removed
• An important objectives is to
actually cause some transplant shock..
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Combination of Tree weights and fruit
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Essential Components – TS Pruning and Training
• Limb renewal • ALL scaffolds are renewed by
complete removal as they become too large for the available space and become out of balance within the tree.
• Renewal cuts are made using
the standard method of using a “bevel cut” which encourages new shoots to form as replacement fruiting limbs.
• There are no permanent
limbs within the tree.
Bevel Cut
Typical Response
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Keep leaders tied up to
support system Cropping in the 2nd and 3rd leaf
will occur mostly along the
leader!
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Essential Components – TS Yield
• Early Fruiting • Fruiting in the second and third leaf is essential to keep a low
tree vigor level and provide income from early fruit sales. • Crops in the early years must also be carefully managed to
prevent biennial bearing. • Aggressive pest management practices are essential starting in
the second year since marketable crops are expected and necessary for optimum profitability.
• This is the only system we have ever tested that achieved a cumulative production over 1000 bushels in the 1st five years, resulting in approximately a 40% increase in crop value compared to the Slender Vertical Axis system.
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Essential Components – TS Support System
• Full Support System • 3m height • Tall inline support posts
(3.5m) and multiple wires. Training wires or small diameter stakes between wires are ideal.
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1) Tall Spindle - very little additional tree growth is required - NO heading of the leader or tipping of the feathers.
Review of the Principles for Tall Spindle
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Principles (cont.) 2. Grow trees to 10’ tall by end of the 3rd leaf by not heading
the leader.
3. Minimize pruning during the first 4 years. • Limit pruning to the removal of excessively vigorous side
branches that compete with the leader. • No heading cuts.
4. Tie branches down. • Tall Spindle – Weight or tie vigorous branches below
horizontal
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Principles (cont.) 5. Allow top of tree to bend with fruit before cutting top back.
6. Annually remove 1-2 branches if they are too large and
develop replacement shoots.
• Tall Spindle – replace and reduce branches in Tall Spindle as they reach 3.5cm in diameter.
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Mechanization for Labor Savings
Hedging Tall Spindle Plantings
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Platforms
Mechanization for Labor Savings
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